def resolve_reference(cls, design_ref):
"""Resolve a reference to a design document.
Locate a schema handler based on the URI scheme of the data reference
and use that handler to get the data referenced.
:param design_ref: A URI-formatted reference to a data entity
"""
try:
design_uri = urllib.parse.urlparse(design_ref)
handler = cls.scheme_handlers.get(design_uri.scheme, None)
if handler is None:
raise errors.InvalidDesignReference(
"Invalid reference scheme %s: no handler." %
design_uri.scheme)
else:
tries = 0
while tries < config_mgr.conf.network.http_client_retries:
try:
# Have to do a little magic to call the classmethod as a pointer
return handler.__get__(None, cls)(design_uri)
except Exception as ex:
tries = tries + 1
if tries < config_mgr.conf.network.http_client_retries:
LOG.debug("Retrying reference after failure: %s" %
str(ex))
time.sleep(5**tries)
except ValueError:
raise errors.InvalidDesignReference(
"Cannot resolve design reference %s: unable to parse as valid URI."
% design_ref)
def resolve_reference_deckhand(self, design_uri):
"""Retrieve design documents from Deckhand endpoints.
Return a byte array of the design document. Assumes Keystone
authentication required.
:param design_uri: Tuple as returned by urllib.parse for the design reference
"""
raise errors.InvalidDesignReference(
"Deckhand references not currently supported.")
def resolve_reference(self, design_ref):
"""Resolve a reference to a design document.
Locate a schema handler based on the URI scheme of the design reference
and use that handler to get the design document referenced.
:param design_ref: A URI-formatted reference to a design document
"""
try:
design_uri = urllib.parse.urlparse(design_ref)
handler = self.scheme_handlers.get(design_uri.scheme, None)
if handler is None:
raise errors.InvalidDesignReference(
"Invalid reference scheme %s: no handler." %
design_uri.scheme)
else:
return handler(design_uri)
except ValueError:
raise errors.InvalidDesignReference(
"Cannot resolve design reference %s: unable to parse as valid URI."
% design_ref)
def resolve_reference(cls, design_ref):
"""Resolve a reference to a design document.
Locate a schema handler based on the URI scheme of the data reference
and use that handler to get the data referenced.
:param design_ref: A URI-formatted reference to a data entity
"""
try:
design_uri = urllib.parse.urlparse(design_ref)
handler = cls.scheme_handlers.get(design_uri.scheme, None)
if handler is None:
raise errors.InvalidDesignReference(
"Invalid reference scheme %s: no handler." %
design_uri.scheme)
else:
# Have to do a little magic to call the classmethod as a pointer
return handler.__get__(None, cls)(design_uri)
except ValueError:
raise errors.InvalidDesignReference(
"Cannot resolve design reference %s: unable to parse as valid URI."
% design_ref)
def resolve_reference_ucp(cls, design_uri):
"""Retrieve artifacts from a Airship service endpoint.
Return a byte array of the response content. Assumes Keystone
authentication required.
:param design_uri: Tuple as returned by urllib.parse for the design reference
"""
ks_sess = KeystoneUtils.get_session()
(new_scheme, foo) = re.subn('^[^+]+\+', '', design_uri.scheme)
url = urllib.parse.urlunparse(
(new_scheme, design_uri.netloc, design_uri.path, design_uri.params,
design_uri.query, design_uri.fragment))
LOG.debug("Calling Keystone session for url %s" % str(url))
resp = ks_sess.get(url, timeout=get_client_timeouts())
if resp.status_code >= 400:
raise errors.InvalidDesignReference(
"Received error code for reference %s: %s - %s" %
(url, str(resp.status_code), resp.text))
return resp.content
